Solderless side seam for tin cans.



Patented May 20, I902.

W. THOMPSON. SOLDERLESS SIDE SEAM FOR TIN CANS. (Application filed Feb.8, 1902.)

(No Model.)

WITNESSES i INVENTUR,

THE nonms ravens o0. vnmwnna. wnsnmmom a. c.

.UNITED STATES PATENT OFFICE.-

\VALTER THOMPSON, OF TORONTO, CANADA, ASSIGNOR, BY MESNE ASSIGN- MENTS,TO THE PACKERS SANITARY CAN COMPANY, OF PATERSON, NEW JERSEY, ACORPORATION OF NEW JERSEY.

SOLDERLESS SIDE SEA M FOR TIN CANS SPECIFICATION forming part of LettersPatent No. 700,577, dated May 20, 1902. Application filed February 3,1902. Serial No. 92,340. (No model.)

To all whom, it may concern.-

Be it known that I, WALTER THOMPSON, a subject of the King of England,residing in Toronto, in the Province of Ontario, Canada,

have invented certain new and useful Improvements in Solderless SideSeams for Tin Cans; and Ido hereby declare the following to be a full,clear, and exact description of the invent-ion, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specification.

This invention relates to the construction of tin or other sheet-metalcans; and it has reference particularly to the construction of vesselsof this nature having interlocked seams.

2b The principal object of the invention is to provide an inexpensiveand simple expedient for strengthening and protecting the seamthroughout the length thereof and for rendering it perfectly tight orleak-proof.

2 5 The invention is fully illustrated in the accompanying drawings,wherein-'- Figure 1 is a side view of a-tin can constructed inaccordance with the principles of my invention, and Fig. 2 is anenlarged perspective view of a portion of said can.

In carrying out my invention the portion a of the metal of the bodyofthe can b immediately contiguous and parallel with the seam c is bentinwardly, forming a relatively sharp angle at d. In the drawings thebend is produced by indenting a narrow strip of the metal immediatelyadjacentand parallel with the seam; but it is Within the scope of myinvention that simply the bend d be produced,

0 in which case, of course, the seam would be disposed in a planerelatively within that of the metal forming the body of the can. The

construction shown, whereby the portion of the metal involved has aV-shaped form in cross-section, is preferable, since thereby a bend at eis produced, as well as the bend cl. By thus shaping the metalimmediately contiguous and parallel to the seam considerable strength isimparted to the can longitudinally thereof in the neighborhood of theseam. In other words, the tendency of blows or jars on the can to bendthe metal in the portion thereof where bending will do injury to thecan-i. a, at the seam by opening it and starting leakage -isprevented,because 5 5' the bends strengthen the metal, and so protectthe seam. In imparting to the metal a V-shaped depression it will befound of considerable value to have the shaping-tool take against theadjoining edge portion of the seam, I

and so bend it down, as at f, to form one side of the depression. Thebend thus produced in the seam at each side thereof throughout itslength will tighten the seam considerably- 6. e., render it the moreimpervious to leakage. At the same time it will strengthen the seamagainst transverse bending.

It will be understood that while my invention is shown in theaccompanying drawings and is intended principally to be applied 76 tocans having interlocked side seams, such as that illustrated, it is alsoapplicable to soldered seams.

Having thus fully described my invention, what I claim as new, anddesire to secure by 7' 5 Letters Patent, is+

1. A sheet-metal vessel provided with a side seam and having contiguousand parallel longitudinal 'ben'ds formed the one in one longitudinaledge portion of the seam of said 80 vessel and the other in the adjacentportion of the body of the'vessel, substantially as described.

2. A sheet-metal vessel provided with a side 'seamand having-thelongitudinal edge p01' tion of said side seam and the portion of themetal of the body of the vessel immediately adjacent to and parallelwith said edge portion bent inwardly to form a longitudinal depressionin said vessel, substantially as deo scribed.

3. Asheet-metal vessel provided with a side seam and having the edgeportions of said side seam depressed out of the plane of the adjacentportion of the material forming the body of the vessel, substantially asdescribed.

4. Asheet-metalvessel providedwithaside have hereunto set my hand this23d day of seam. and having the portion of the metal January, 1902.

thereof which comprises the contiguous portions of the seam and body ofthe vessel WALTER 'LHOMPSON' 5 pressed inwardly from end to end of saidves- Witnesses:

se1,' substantially as described. s JOHN W. STEWARD, In testimony that Iclaim the foregoing I ROBERT J. POLLITT.

